I'm in Bangkok every month for business purposes and this apartment has been the best i experienced. Not small, as all the others, a lot of natural light, well furnished (good taste), well equipped (i cocked almost all evenings), comfortable, no noise, super clean, no bed smell, close to BTS, what else ...?
Entering you fell well, leaving there you feel well.
If you are looking for a good and comfortable apartment, this is for sure a super good choice.
The building is not new, but your are leaving inside, not outside. The street is for sure not the most elegant but the apartment is quite far from crowed area.
Once again, my personal evaluation is 5+ stars.